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Exploring natural history one itsy bitsy spider at a time...

Exploring natural history one itsy bitsy spider at a time...

Monday, August 29, 2011

Green Heron

Stalking crayfish on the edge of the lake.

Getting a closer look at me.

Lake Redman, York, PA.



Little Blue Heron Juvenille


Smaller than a great egret, this little heron has greenish legs, and a pink bill with black tip.  This photo was taken with a point-and-shoot camera through a viewing scope on Lake Redman in York, PA.

Sunday, June 19, 2011

Searching for Horseshoe Crabs on the Delaware Bay

We were on the hunt for the horseshoe crab.  A creature that has survived on our planet for hundreds of millions of years, and due to our mass collection for conch and eel bait, had recently been declining.  Due to regulations on crab collection, their population on the Atlantic coast seems to be stabilizing.  However, as we observed, they still have many man-made obstacles to overcome, as do the migratory birds that depend on their eggs as a stop-over food source.  Each May and June horseshoe crabs gather on beaches of the Delaware Bay to breed at high tides during the full and new moons.  

First stop, DuPont Nature Center in Milford, DE.  www.dupontnaturecenter.org

An aquarium with baby horseshoe crabs!  They are smaller than a pinky fingernail.  The light green balls are the eggs.

In the parking lot, fiddler crabs!  Bonus arthropod!

More fiddler crabs in a puddle in the parking lot. 

Second stop, Slaughter beach.  The entrance has a great picnic area.

Mating pairs left on the beach from the past nights full moon.  Most were dead, but many were just stranded as the tide receded and had managed to keep their gills moist enough to survive a few hours into the daytime heat and predators (gulls).  

A male crab covered with Atlantic slipper shells.  It's mouth is visible as a fuzzy looking spot where it's legs meet.  It's front hooked legs identify it as a male.  It uses the hooks to hold onto the shell of a female.  All the claws, legs, and mouth are completely harmless.  The only dangerous aspects of the crabs are stepping on the tail barefoot, or putting your fingers between the hinges of the shell.  The crabs are super strong, and could squish your fingers by accident.

Third stop, Port Mahon Road off of Rt. 9.  Walking along Port Mahon Road where boulders and the road strand horseshoe crabs as the tides recede.  They can't climb over rocks, but still return here expecting the natural beaches that must have been here historically.  

A stranded female horseshoe crab.  She's probably at least 11 years old to be mature enough to lay eggs.

Washed up blue eggs on the shore, a staple high protein food source for migrating shore birds like red knots, sanderlings, rusty turnstones, plovers, sandpipers, and willets.  

The boulders along the shore cause hundreds of crab deaths.  It was heart-breaking to see.

Luckily we were able to find some survivors and return them to the waves.

We came across a few spots on Port Mahon Road that were covered in a foot or more of a peat moss consistency mud.  I tried to reach the crabs that were stuck, but I sunk right in and lost my shoes.  We had to keep off these spots.

Horseshoe crabs buried in a thick wet soil that was washing up on shore.

Here's a male still holding onto the female despite being stuck between rocks suffocating in the sun.

Here's a crab that was still alive, but bleeding.  The thick blue blood is excellent at fighting off bacterial invasion so I imagine it will survive the injury.  We found many crabs with holes right through their shells that had healed.  "The horseshoe crab plays a vital, if little-known, role in the life of anyone who has received an injectable medication. An extract of the horseshoe crab's blood is used by the pharmaceutical and medical device industries to ensure that their products, e.g., intravenous drugs, vaccines, and medical devices, are free of bacterial contamination. No other test works as easily or reliably for this purpose."  -www.horseshoecrab.org

The "hairiest" crab we found.  It was covered in seaweeds or algae.

We found a huge female diamond-back terrapin looking for a good nesting site.

Learn more about these amazing creatures by exploring www.horseshoecrab.org, and visiting Dupont Nature Center, www.dupontnaturecenter.org.  

Thursday, June 16, 2011

Paddling on the Susquehanna


goose tracks in the sandy soil speckled with coal fragments

turtle tracks

mayfly subimago (first adult stage) landed on my hand

a little birdy tried to eat this giant snail?

Eagle tracks!

evidence of the surrounding tree species washed up on shore


gotta get dirty to have fun

helicopters and planes flying through the sunset

perfect reflected trees and sky on the still waters

Tuesday, June 14, 2011

Fledglings

The house wrens almost ready to leave the nest.  Once the young leave the nest, the parents continue to feed them for about two weeks.  Then the female will leave to start another brood, while the male continues to feed them.  

Mamma house wren yelling at me for getting to close.

Baby mockingbirds almost ready to leave their nest.


Tuesday, May 31, 2011

Tuesday, April 12, 2011

Presents from Spring!

A lovely rainy walk on the geology trail at Nixon Park Nature Center turned up lots of spring excitement!


Trout Lily leaves!  The tiny yellow lily flowers are sure to bloom any day now.  The spots are said to look like rainbow trout and the flowers are supposed to bloom on the first day of trout season.


Mayapple leaves are popping up.  The fruits that grow the second year are melon flavored lemon-looking yellow balls.  They're food for box turtles and small mammals, but only when they're perfectly ripe.  Otherwise, the fruit is poisonous, along with the leaves, stems, and roots.


Skunk cabbage flowers bloomed the end of February this year at Nixon Park.  The purple spathe holds a  whiteish-yellow spadix inside.  Incase the fowl smell isn't enough to attract gnat pollinators, the flower actually produces its own heat to offer the small insects a warm refuge.   The flower consumes as much oxygen as a small mammal to regulate its heat, reaching up to 37 degrees Fahrenheit above the outside air temperature.  


Two months later, the flowers have been pulled underground by the massive root system and the leaves start to grow.  For more information on the first spring flower, check out this incredibly in depth resource.


Young red-backed salamander in lead-back phase. 


Bloodroots' fleeting blooms will shortly give way to single large deeply lobed leaves.  The rhizome oozes orange-red liquid when snapped open- supposedly having multiple medicinal uses including treating skin conditions.  




Leaves of touch-me-not or jewelweed are popping up in wet places.  In this photo they demonstrate one way they got their name.  Water droplets bead up like shimmery jewels on the leaves.  When bigger, this annual's juicy stems can be used to soothe the itch from poison ivy and insect bites.  


Back in March, next to skunk cabbage, the only wildflower I could find was this round lobed hepatica with it's evergreen leaves from last year.  

Enjoy the spring!